Kofloc RK1975 Series User manual

FJ4000027G1
Created on 2019/12/1
Lead Switch Flow Meter
Instruction Manual
Thank you for your selection of “KOFLOC Area Flow Meter.”
Prior to use, read this manual thoroughly to ensure your new meter will work to its
fullest capacity.
Lead Switch Flow Meter
MODEL RK1975 SERIES
Lead Switch Flow Meter for Large Flow Rate
MODEL RK2005 SERIES

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CAUTION
This product is designed for controlling the flow rate and its
maximum working pressure is limited to:
ＲＫ１９７５ ：０．５ＭＰａ
ＲＫ２００５ ：０．７ＭＰａ
The use of fluids, such as toxic gas, other than those marked
on the flow meter or the use of the product at a temperature
or pressure above the maximum limits could result in
personal injury. Such a way of use is strictly prohibited.
Note that if solenoid valves are installed before and after
the flow meter and they are opened and closed under pressure,
the float will jump up to break the glass. Be sure the flow
meter will not be subjected to direct pressure fluctuations.
Foreword
Thank you for your selection of Model RK1975/Model RK2005 Series.
・The contents of the manual are subject to change without notice.
・The manual has been created meticulously. Should, however, you notice any
deficiencies, errors or omissions, you are kindly requested to notify us.
・The warranty period of this product is one (1) year after shipment.
・Failures attributable to KOFLOC which may occur during the warranty period will
be remedied free of charge.
・KOFLOC shall not be held responsible whatsoever for breakdown or trouble of
equipment which results from negligence of the precautions described in this
manual or using the product by methods other than the described procedures.

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1. Features
This is a compact, low-price lead switch flow meter for monitoring gas and liquid flow
rates. This meter is most suitable for cooling water process control.
2. Installation and Piping
Select either installation method; embedding in the panel (secured together with the
front cover) or mounting on the panel (secured with included nuts). (Model 2005
Series is only by embedding in the panel.)
3. How to Use
3-1 Basic Handling Procedures of the Flow Meter
For the basic handling procedures, see KOFLOC standard “Flow Meter Instruction
Manual.”
3-2 Handling of the Lead Switch Sensor
3-2-1 Setting the switch position
(1) Magnetic substances such as iron affect the operation of the lead switch flow
meter. Avoid using the meter near magnetic substances. Prior to use, verify
the operation with the actual equipment on which the meter is to be installed.
(2) After installing the flow meter, let fluid flow and set a flow rate to operate the
float.
(3) Loosen the lead switch fixing screw slightly and locate the lead switch in the
lowest position.
(4) Gradually slide up the lead switch and tighten to secure the lead switch fixing
screw where the contact operates.
(5) For verification of the operation after setting, move the float up and down
several times (by flow adjustment) to see if the contact operates (closes or
opens) in the desired position.
(6) If the position is not correct, finely adjust the lead switch up or down.
(7) Note that there is a difference in positions of the float where the contact closes
(ON) and opens (OFF).
3-2-2 Lead wire of the lead switch flow meter
(1) Do not pull or push in the cable from the lead switch flow meter. (Lead wire
length: Standard 65 cm)
(2) Connect the lead wire to equipment using a secure method such as a crimped
terminal or connector.
(3) Do not apply a voltage nor let current flow above the rating of the switch.

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Contact capacity: 100 VAC/100 VDC, 10 VA AC, 10 W DC
Note: The contact capacity in the case of connection to inductive load varies
according to loading conditions.
(4) Give considerations to routing of the lead wire so that the wire will not be
damaged by the flow meter installation condition.
3-2-3 Environment for the lead switch flow meter
(1) Protect the lead switch flow meter from water.
(2) Protect the lead switch flow meter from impact and vibration.
(3) Do not install the lead switch flow meter in places where it will be hit by direct
sunlight or radiant heat.
(4) Do not install the lead switch flow meter in environment where corrosive
gases are present.
－RK1975 －
【Specifications】
Fluid
H2O、Gas (H2 unavailable)
Accuracy
F.S. ±5%
Pressure resistance
Standard 0.5MPa
Materials
SUS316、Hard Glass、FKM、POM (PTFE、Nylon)
Effective scale
10：1
Connection
Rc1/4
Ambient temperature
10℃～35℃(No condensation)
【Standard】
Standard
H2O
AIR
A
B
C
D
E
Contact
15
0.1~1L/MIN
0.3~3L/MIN
0.5~5L/MIN
3~30L/MIN
10~100L/MIN
15~150L/MIN
150
130
110
116
100
(A) ON when
up above
setting.
(B) ON when
down below
setting.
20
0.3~3L/MIN
0.5~5L/MIN
10~100L/MIN
15~150L/MIN
200
180
160
166
150
Alarm conta
–ct range
20%～90%F.S. common
Contactcapa
-city
AC100V／DC100V （AC10VA／DC10W）
＊The flow rate indication is based on air (atmospheric pressure) 20℃or H2O 20℃(0.3 MPa).

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【RK1975 External Dimensions】
Panel cut
Embedding in panel Mounting on panel
(Secured together with front cover) (Secured with included nuts)
＊The figures are for the lower needle.
For the upper needle, the top/bottom dimensions are reversed.

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Created on 2019/12/1
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－RK2005 －
【Specifications】
Fluid
H2O、Gas (H2 unavailable)
Accuracy
F.S. ±5%
Pressure
resistance
0.7MPa
Max. working
pressure
0.6MPa
Materials
(B) Brass、Hard Glass、NBR（SUS316、POM、PTFE、SUS304）
(S) SUS304、Hard Glass、FKM（SUS316、PCTFE、PTFE）
Effective
scale
10：1
Connection
Rc3/8、Rc3/4
Ambient
temperature
10℃～35℃(No condensation)
【Standard】
Standard
H2O
AIR
Contact
20
connection
Rc3/8
1.0~10L/MIN
20~200L/MIN
25~250L/MIN
30~300L/MIN
(A) ON when up above setting.
(B) ON when down below
setting.
25
connection
Rc3/4
2.0~20L/MIN
3.0~30L/MIN
40~400L/MIN
50~500L/MIN
70~700L/MIN
100~1000L/MIN
Alarm
contact range
20%～90% F.S. common
Contact
capacity
AC100V／DC100V （AC10VA／DC10W）
＊The flow rate indication is based on air (atmospheric pressure) 20℃or H2O 20℃(0.3 MPa).

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Created on 2019/12/1
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【RK2005 Dimensions(Connection Rc3/8)】
Panel cut
Embedding in panel (Secured
together with front cover)
＊The figures are for the lower needle.
For the upper needle, the top/bottom dimensions are reversed.
【RK2005 Dimensions (Connection Rc3/4)】
Panel cut
Embedding in panel (Secured
together with front cover)
＊The figures are for the lower needle.
For the upper needle, the top/bottom dimensions are reversed.

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4. Product Warranty Policy
Thank you for your continued support of KOFLOC products.
Unless specified otherwise in quotations, contracts or specifications when you place
orders for KOFLOC products, the following warranty policy will apply.
Warranty Policy:
①Warranty period
The warranty period is one (1) year from shipment, provided that the product is
used within the KOFLOC specification.
②Scope of warranty
If the KOFLOC product fails during the warranty period due to a cause
attributable to KOFLOC, KOFLOC shall, at its option and expense, provide a
replacement product or repair the failed product at the KOFLOC factory.
This warranty, however, shall not cover damages due to a cause not
attributable to KOFLOC; opportunity loss, lost profit, secondary disaster,
accident compensation suffered by the customer and damage to other
equipment and any other damages due to a failure of the KOFLOC product.
③Non-warranty
The warranty shall not apply to the following failures and damages even if they
occur during the warranty period:
a) Failure due to misuse or improper repair or modification. (Failures
resulting from use under conditions different from the manufacturing
specifications are included.)
b) Damage and failure due to dropping of the product after purchase.
c) Failure due to fire, earthquake, flood, lightning or other natural disaster; or
riot, war or the like.
d) Failure due to intrusion of foreign matter from piping.
e) Failure caused by a specific problem due to combination with other
incorporated equipment.
f) Other failures and damages which are considered not attributable to
KOFLOC.
Please be aware that the warranty shall not cover opportunity loss suffered
by you or your customer or damage to other equipment or any other damages
due to a failure of the KOFLOC product.
URL：http://www.kofloc.co.jp